2129672701 has 4 divisors (see below), whose sum is σ = 2293493692. Its totient is φ = 1965851712.

The previous prime is 2129672663. The next prime is 2129672707. The reversal of 2129672701 is 1072769212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 856967076 + 1272705625 = 29274^2 + 35675^2 .

It is a cyclic number.

It is not a de Polignac number, because 2129672701 - 2²³ = 2121284093 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2129672707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81910476 + ... + 81910501.

It is an arithmetic number, because the mean of its divisors is an integer number (573373423).

Almost surely, 2^2129672701 is an apocalyptic number.

It is an amenable number.

2129672701 is a deficient number, since it is larger than the sum of its proper divisors (163820991).

2129672701 is a wasteful number, since it uses less digits than its factorization.

2129672701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163820990.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 2129672701 is about 46148.3770137152. The cubic root of 2129672701 is about 1286.5824450750.

The spelling of 2129672701 in words is "two billion, one hundred twenty-nine million, six hundred seventy-two thousand, seven hundred one".